Numerical - Natural frequency of system, given K & mass

Q.  Determine natural frequency of a system, which has equivalent spring stiffness of 30000 N/m and mass of 20 kg?
- Published on 10 Sep 15

a. 12.32 Hz
b. 4.10 Hz
c. 6.16 Hz
d. None of the above

ANSWER: 6.16 Hz

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    Discussion

  • SUMIT BHATT   -Posted on 07 Aug 18
    Wn=vk/m=v30000/20=38.77
    after that: Natural frequency (f)is;
    f=1/2p × vk/m
    f=1/2p × 38.72=6.16 Hz.,that is answer c.
  • prasanna s m   -Posted on 27 Apr 17
    f=sqrt(k/m)/2*3.14,,,=6.16

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